#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>

int main(){
  pid_t id = fork();
  if(id < 0){
    perror("fork");
    return 1;
  }
  else if(id > 0){ //parent
   printf("parent[%d] is sleeping...\n", getpid());
   sleep(30);
  }
  else{
  printf("child[%d] is begin Z...\n", getpid());
  sleep(5);
  }
  return 0;
}
